LVMA Electric LMQ3 Fuse - Type Isolating Switch: ATSE - Enabled Power Continuity & Protection

Circuit isolation: It can safely cut off the circuit and achieve timely isolation.

Overload and short-circuit protection: Use fuses to quickly cut off faulty circuits to prevent system damage.

Dual power supply Automatic Switching: When the main power supply fails, the system will seamlessly switch between the "public" power supply and the "backup" power supply, thereby maintaining the stability and continuity of power supply.

This equipment can be applied to critical mission Settings such as industrial control, building power distribution, data centers and hospitals. It solves the reliability problem in power-sensitive environments.

Key Parameters

Rated Current & Application Scenarios

The LMQ3 covers a very wide current range: the basic models include 63A, 250A and 630A, plus rated values from 16/20A to 500/630A. This flexibility lets it handle everything from end-point distribution to industrial main power control.

Electrical Performance

Control voltage is standardized at AC220V, simplifying system integration. Control current comes in two types: 3.5A for 16–125A models and 7A for 160A+ models, matching different control loop loads.

It can withstand short-circuit currents up to 10kA, resisting surge impacts to keep the system stable.

Lifespan & Operational Capability

Mechanical lifespan: 20,000 cycles for 16–125A models and 17,000 cycles for 160A+ models, suitable for frequent switching. Electrical lifespan is 6,000 cycles across all models, ensuring long-term reliability.

Operating cycles per minute: 10 for 16–125A models and 15 for 250A+ models, meeting high-frequency transfer needs.

Structural Design & Features

Fuse-Type Isolation Protection

Fuses act as the core protective component, combining isolation (for safe maintenance) and protection (cutting off overloads/short circuits) in one unit—reducing potential failure points.

Dual-Power AtsE Logic

The panel clearly marks "Normal" (main power) and "Standby" (backup power). An intelligent detection module handles automatic switching: switches to standby power when the main supply fails; switches back to main power (manually or automatically) once it’s restored (configurable via the controller).

Smart ATS Controller Interface

The dedicated controller has these features:

• Indicator lights: Show phase voltage status (A/B/C) for main/emergency power (light up within set voltage ranges) and circuit breaker closure status (light up when power is active).
• Safety logic: Prevents both power sources from being energized at the same time (following schematic guidelines) to avoid conflicts.

Installation & Dimensional Compatibility

There are two base sizes (125mm, 250mm), with detailed dimension diagrams specifying lengths, hole sizes, and mounting points (A, B, C, etc.). Designed for mechanical compatibility, it integrates easily into standard switchgear and distribution cabinets.

Application Value & Summary

LVMA Electrical’s LMQ3 fuse-type isolating switch fills a key gap in traditional distribution systems: combining isolation, protection, and smart transfer into one compact unit. Its main advantages:

• Simplifies system design (fewer components mean fewer failure points).
• Improves uptime with automatic transfer and easy status monitoring.
• Scales from small-scale end-point distribution to industrial main power control, thanks to its broad current ratings.

For power systems needing reliability, safety, and efficiency, the LMQ3 offers an all-in-one solution—showcasing LVMA Electrical’s expertise in advanced power management.